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Pesquisa : D02.455.426.559.389.261.400 [Categoria DeCS]
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[PMID]:28942276
[Au] Autor:Wang H; Cao X; Li L; Fang Z; Li X
[Ad] Endereço:School of Energy and Environment, Southeast University, Nanjing 210096, China. Electronic address: lwcq306@163.com.
[Ti] Título:Augmenting atrazine and hexachlorobenzene degradation under different soil redox conditions in a bioelectrochemistry system and an analysis of the relevant microorganisms.
[So] Source:Ecotoxicol Environ Saf;147:735-741, 2018 Jan.
[Is] ISSN:1090-2414
[Cp] País de publicação:Netherlands
[La] Idioma:eng
[Ab] Resumo:Soil microbial fuel cells (MFCs) are a sustainable technology that degrades organic pollutants while generating electricity. However, there have been no detailed studies of the mechanisms of pollutant degradation in soil MFCs. In this study, the effects of external resistance and electrode effectiveness on atrazine and hexachlorobenzene (HCB) degradation were evaluated, the performance of soil MFCs in the degradation of these pollutants under different soil redox conditions was assessed, and the associated microorganisms in the anode were investigated. With an external resistance of 20Ω, the degradation efficiencies of atrazine and HCB were 95% and 78%, respectively. The degradation efficiency, degradation rate increased with decreasing external resistance, while the half-life decreased. There were different degradation trends for different pollutants under different soil redox conditions. The fastest degradation rate of atrazine was in the upper MFC section (aerobic), whereas that of HCB was in the lower MFC section (anaerobic). The results showed that electrode effectiveness played a significant role in pollution degradation. In addition, the microbial community analysis demonstrated that Proteobacteria, especially Deltaproteobacteria involved in current generation was extremely abundant (27.49%) on soil MFC anodes, although the percentage abundances of atrazine degrading Rhodocyclaceae (8.77%), Desulfitobacterium (0.64%), and HCB degrading Desulfuromonas (0.73%), were considerably lower. The results of the study suggested that soil MFCs can enhance the degradation of atrazine and HCB, and bioelectrochemical reduction was the main mechanism for the pollutants degradation.
[Mh] Termos MeSH primário: Atrazina/análise
Fontes de Energia Bioelétrica/microbiologia
Técnicas Eletroquímicas/métodos
Hexaclorobenzeno/análise
Poluentes do Solo/análise
Solo/química
[Mh] Termos MeSH secundário: Aerobiose
Anaerobiose
Biodegradação Ambiental
Eletrodos
Meia-Vida
Cinética
Oxirredução
Proteobactérias/crescimento & desenvolvimento
Bactérias Redutoras de Enxofre/crescimento & desenvolvimento
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Soil); 0 (Soil Pollutants); 4Z87H0LKUY (Hexachlorobenzene); QJA9M5H4IM (Atrazine)
[Em] Mês de entrada:1803
[Cu] Atualização por classe:180308
[Lr] Data última revisão:
180308
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170925
[St] Status:MEDLINE


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[PMID]:28923513
[Au] Autor:Miret N; Rico-Leo E; Pontillo C; Zotta E; Fernández-Salguero P; Randi A
[Ad] Endereço:Universidad de Buenos Aires, Facultad de Medicina, Departamento de Bioquímica Humana, Laboratorio de Efectos Biológicos de Contaminantes Ambientales, Paraguay 2155, 5° piso, CP1121, Buenos Aires, Argentina.
[Ti] Título:A dioxin-like compound induces hyperplasia and branching morphogenesis in mouse mammary gland, through alterations in TGF-ß1 and aryl hydrocarbon receptor signaling.
[So] Source:Toxicol Appl Pharmacol;334:192-206, 2017 Nov 01.
[Is] ISSN:1096-0333
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Hexachlorobenzene (HCB) is a widespread environmental pollutant and a dioxin-like compound that binds weakly to the aryl hydrocarbon receptor (AhR). Because AhR and transforming growth factor ß1 (TGF-ß1) converge to regulate common signaling pathways, alterations in this crosstalk might contribute to developing preneoplastic lesions. The aim of this study was to evaluate HCB action on TGF-ß1 and AhR signaling in mouse mammary gland, through AhR+/+ and AhR-/- models. Results showed a differential effect in mouse mammary epithelial cells (NMuMG), depending on the dose: 0.05µM HCB induced cell migration and TGF-ß1 signaling, whereas 5µM HCB reduced cell migration, promoted cell cycle arrest and stimulated the dioxin response element (DRE) -dependent pathway. HCB (5µM) enhanced α-smooth muscle actin expression and decreased TGF-ß receptor II mRNA levels in immortalized mouse mammary fibroblasts AhR+/+, resembling the phenotype of transformed cells. Accordingly, their conditioned medium was able to enhance NMuMG cell migration. Assays in C57/Bl6 mice showed HCB (3mg/kg body weight) to enhance ductal hyperplasia, cell proliferation, estrogen receptor α nuclear localization, branch density, and the number of terminal end buds in mammary gland from AhR+/+ mice. Primary culture of mammary epithelial cells from AhR+/+ mice showed reduced AhR mRNA levels after HCB exposure (0.05 and 5µM). Interestingly, AhR-/- mice exhibited an increase in ductal hyperplasia and mammary growth in the absence of HCB treatment, thus revealing the importance of AhR in mammary development. Our findings show that environmental HCB concentrations modulate AhR and TGF-ß1 signaling, which could contribute to altered mammary branching morphogenesis, likely leading to preneoplastic lesions and retaining terminal end buds.
[Mh] Termos MeSH primário: Poluentes Ambientais/toxicidade
Hexaclorobenzeno/toxicidade
Hiperplasia/induzido quimicamente
Glândulas Mamárias Animais/efeitos dos fármacos
Receptores de Hidrocarboneto Arílico/metabolismo
Fator de Crescimento Transformador beta1/metabolismo
[Mh] Termos MeSH secundário: Actinas/genética
Actinas/metabolismo
Animais
Linhagem Celular
Feminino
Regulação da Expressão Gênica/fisiologia
Glândulas Mamárias Animais/citologia
Glândulas Mamárias Animais/patologia
Camundongos
Camundongos Endogâmicos C57BL
RNA Mensageiro/genética
RNA Mensageiro/metabolismo
Receptores de Hidrocarboneto Arílico/genética
Transdução de Sinais
Fator de Crescimento Transformador beta1/genética
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Actins); 0 (Environmental Pollutants); 0 (RNA, Messenger); 0 (Receptors, Aryl Hydrocarbon); 0 (Transforming Growth Factor beta1); 0 (alpha-smooth muscle actin, mouse); 4Z87H0LKUY (Hexachlorobenzene)
[Em] Mês de entrada:1710
[Cu] Atualização por classe:171017
[Lr] Data última revisão:
171017
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170920
[St] Status:MEDLINE


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[PMID]:28634113
[Au] Autor:Romualdo GR; Goto RL; Fernandes AAH; Cogliati B; Barbisan LF
[Ad] Endereço:UNESP - São Paulo State University, Botucatu Medical School, Department of Pathology, Botucatu, São Paulo State, Brazil.
[Ti] Título:Vitamin D supplementation attenuates the early stage of mouse hepatocarcinogenesis promoted by hexachlorobenzene fungicide.
[So] Source:Food Chem Toxicol;107(Pt A):27-36, 2017 Sep.
[Is] ISSN:1873-6351
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Hexachlorobezene (HCB), a fungicide widely distributed in the environment, promotes the development of hepatocellular preneoplastic lesions (PNL) and tumors in rodents. In contrast, vitamin D (VD ) supplementation presents a potential role for the prevention/treatment of chronic liver diseases. Thus, we investigated whether VD supplementation attenuates the early stage of HCB-promoted hepatocarcinogenesis. Female Balb/C mice were injected a single dose of diethylnitrosamine (DEN, 50 mg/kg) at postnatal day 15. From day 40 onwards, mice were fed with a standard diet containing 0.02% HCB alone or supplemented with VD (10,000 or 20,000 IU/Kg diet) for 20 weeks. Untreated mice were fed just standard diet. After this period, mice were euthanized and liver and serum samples were collected. Compared to the untreated group, DEN/HCB treatment decreased total hepatic glutathione levels and glutathione peroxidase (GSH-Px) activity while increased lipid peroxidation, p65 protein expression, cell proliferation/apoptosis and the PNL development. In contrast, dietary VD supplementation enhanced vitamin D receptor (VDR) protein expression, total glutathione levels and GSH-Px activity while diminished lipid hydroperoxide levels. Also, VD supplementation decreased p65 protein expression, hepatocyte proliferation, the size and the liver area occupied by PNL. Therefore, our findings indicate that VD supplementation attenuates the early stage of HCB-promoted hepatocarcinogenesis.
[Mh] Termos MeSH primário: Colecalciferol/administração & dosagem
Suplementos Nutricionais/análise
Fungicidas Industriais/toxicidade
Hexaclorobenzeno/toxicidade
Neoplasias Hepáticas Experimentais/prevenção & controle
[Mh] Termos MeSH secundário: Animais
Apoptose/efeitos dos fármacos
Proliferação Celular/efeitos dos fármacos
Colecalciferol/análise
Feminino
Fungicidas Industriais/metabolismo
Glutationa/metabolismo
Hexaclorobenzeno/metabolismo
Seres Humanos
Fígado/efeitos dos fármacos
Fígado/metabolismo
Neoplasias Hepáticas Experimentais/etiologia
Neoplasias Hepáticas Experimentais/metabolismo
Neoplasias Hepáticas Experimentais/patologia
Camundongos
Camundongos Endogâmicos BALB C
Estresse Oxidativo/efeitos dos fármacos
Receptores de Calcitriol/genética
Receptores de Calcitriol/metabolismo
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Fungicides, Industrial); 0 (Receptors, Calcitriol); 1C6V77QF41 (Cholecalciferol); 4Z87H0LKUY (Hexachlorobenzene); GAN16C9B8O (Glutathione)
[Em] Mês de entrada:1708
[Cu] Atualização por classe:170829
[Lr] Data última revisão:
170829
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170622
[St] Status:MEDLINE


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[PMID]:28486186
[Au] Autor:Gorito AM; Ribeiro AR; Almeida CMR; Silva AMT
[Ad] Endereço:Laboratory of Separation and Reaction Engineering - Laboratory of Catalysis and Materials (LSRE-LCM), Faculdade de Engenharia, Universidade do Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal.
[Ti] Título:A review on the application of constructed wetlands for the removal of priority substances and contaminants of emerging concern listed in recently launched EU legislation.
[So] Source:Environ Pollut;227:428-443, 2017 Aug.
[Is] ISSN:1873-6424
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:The presence of organic pollutants in the aquatic environment, usually found at trace concentrations (i.e., between ng L and µg L or even lower, known as micropollutants), has been highlighted in recent decades as a worldwide environmental concern due to their difficult elimination by conventional water and wastewater treatment processes. The relevant information on constructed wetlands (CWs) and their application for the removal of a specific group of pollutants, 41 organic priority substances/classes of substances (PSs) and 8 certain other substances with environmental quality standards (EQS) listed in Directive 2013/39/EU as well as 17 contaminants of emerging concern (CECs) of the Watch List of Decision 2015/495/EU, is herein reviewed. Studies were found for 24 PSs and 2 other substances with EQS: octylphenol, nonylphenol, perfluorooctane sulfonic acid, di(2-ethylhexyl)phthalate, trichloromethane, dichloromethane, 1,2-dichloroethane, pentachlorobenzene, benzene, polychlorinated dibenzo-p-dioxins, naphthalene, fluoranthene, trifluralin, alachlor, isoproturon, diuron, tributyltin compounds, simazine, atrazine, chlorpyrifos (chlorpyrifos-ethyl), chlorfenvinphos, hexachlorobenzene, pentachlorophenol, endosulfan, dichlorodiphenyltrichloroethane (or DDT) and dieldrin. A few reports were also published for 8 CECs: imidacloprid, erythromycin, clarithromycin, azithromycin, diclofenac, estrone, 17-beta-estradiol and 17-alpha-ethinylestradiol. No references were found for the other 17 PSs, 6 certain other substances with EQS and 9 CECs listed in EU legislation.
[Mh] Termos MeSH primário: União Europeia
Eliminação de Resíduos Líquidos/métodos
Poluentes Químicos da Água/análise
Poluição Química da Água/estatística & dados numéricos
Zonas Úmidas
[Mh] Termos MeSH secundário: Política Ambiental
Estradiol/análise
Estrona
Etinilestradiol/análise
Dicloretos de Etileno
Hexaclorobenzeno/análise
Compostos Organotiofosforados
Fenóis
Eliminação de Resíduos Líquidos/legislação & jurisprudência
Águas Residuais
Poluição Química da Água/legislação & jurisprudência
[Pt] Tipo de publicação:JOURNAL ARTICLE; REVIEW
[Nm] Nome de substância:
0 (Ethylene Dichlorides); 0 (Organothiophosphorus Compounds); 0 (Phenols); 0 (Waste Water); 0 (Water Pollutants, Chemical); 0 (chlorpyrifos-ethyl); 0 (octylphenol); 2DI9HA706A (Estrone); 423D2T571U (Ethinyl Estradiol); 4TI98Z838E (Estradiol); 4Z87H0LKUY (Hexachlorobenzene); 55163IJI47 (ethylene dichloride); 79F6A2ILP5 (nonylphenol)
[Em] Mês de entrada:1706
[Cu] Atualização por classe:170622
[Lr] Data última revisão:
170622
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170510
[St] Status:MEDLINE


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[PMID]:28438788
[Au] Autor:Grice BA; Nelson RG; Williams DE; Knowler WC; Mason C; Hanson RL; Bullard KM; Pavkov ME
[Ad] Endereço:National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Phoenix, Arizona, USA.
[Ti] Título:Associations between persistent organic pollutants, type 2 diabetes, diabetic nephropathy and mortality.
[So] Source:Occup Environ Med;74(7):521-527, 2017 Jul.
[Is] ISSN:1470-7926
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:OBJECTIVE: Relationships were examined between persistent organic pollutants (POPs) and incident type 2 diabetes, end-stage renal disease (ESRD) and mortality. METHODS: In a nested case-control study, 300 persons without diabetes had baseline examinations between 1969 and 1974; 149 developed diabetes (cases) and 151 remained non-diabetic (controls) during 8.0 and 23.1 years of follow-up, respectively. POPs were measured at baseline. ORs for diabetes were computed by logistic regression analysis. The cases were followed from diabetes onset to ESRD, death or 2013. HRs for ESRD and mortality were computed by cause-specific hazard models. Patterns of association were explored using principal components analysis. RESULTS: PCB151 increased the odds for incident diabetes, whereas hexachlorobenzene (HCB) was protective after adjusting for age, sex, body mass index, sample storage characteristics, glucose and lipid levels. Associations between incident diabetes and polychlorinatedbiphenyl (PCB) or persistent pesticide (PST) components were mostly positive but non-significant. Among the cases, 29 developed ESRD and 48 died without ESRD. PCB28, PCB49 and PCB44 increased the risk of ESRD after adjusting for baseline demographic and clinical characteristics. Several PCBs and PSTs increased the risk of death without ESRD. The principal components analysis identified PCBs with low-chlorine load positively associated with ESRD and death without ESRD, and several PSTs associated with death without ESRD. CONCLUSIONS: Most POPs were positively but not significantly associated with incident diabetes. PCB151 was significantly predictive and HCB was significantly protective for diabetes. Among participants with diabetes, low-chlorine PCBs increase the risk of ESRD and death without ESRD, whereas several PSTs predict death without ESRD.
[Mh] Termos MeSH primário: Diabetes Mellitus Tipo 2/induzido quimicamente
Diabetes Mellitus Tipo 2/epidemiologia
Nefropatias Diabéticas/induzido quimicamente
Nefropatias Diabéticas/mortalidade
Exposição Ambiental/efeitos adversos
Falência Renal Crônica/induzido quimicamente
Falência Renal Crônica/mortalidade
Praguicidas/efeitos adversos
[Mh] Termos MeSH secundário: Adolescente
Adulto
Arizona/epidemiologia
Estudos de Casos e Controles
Causas de Morte
Diabetes Mellitus Tipo 2/sangue
Poluentes Ambientais/efeitos adversos
Feminino
Fungicidas Industriais/efeitos adversos
Hexaclorobenzeno/efeitos adversos
Seres Humanos
Índios Norte-Americanos
Modelos Logísticos
Masculino
Compostos Orgânicos/efeitos adversos
Bifenilos Policlorados/efeitos adversos
Adulto Jovem
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Environmental Pollutants); 0 (Fungicides, Industrial); 0 (Organic Chemicals); 0 (Pesticides); 4Z87H0LKUY (Hexachlorobenzene); DFC2HB4I0K (Polychlorinated Biphenyls)
[Em] Mês de entrada:1708
[Cu] Atualização por classe:170803
[Lr] Data última revisão:
170803
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170426
[St] Status:MEDLINE
[do] DOI:10.1136/oemed-2016-103948


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[PMID]:28392239
[Au] Autor:Dehnhard N; Jaspers VLB; Demongin L; Van den Steen E; Covaci A; Pinxten R; Crossin GT; Quillfeldt P; Eens M; Poisbleau M
[Ad] Endereço:Department of Biology, Behavioural Ecology and Ecophysiology Group, University of Antwerp, Campus Drie Eiken, Universiteitsplein 1, 2610 Antwerp (Wilrijk), Belgium. Electronic address: nina.dehnhard@uantwerpen.be.
[Ti] Título:Organohalogenated contaminants in plasma and eggs of rockhopper penguins: Does vitellogenin affect maternal transfer?
[So] Source:Environ Pollut;226:277-287, 2017 Jul.
[Is] ISSN:1873-6424
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Although many studies have investigated organohalogenated contaminants (OHCs) in yolk, little is known about the mechanisms and timing of transfer of OHCs from the female to the egg. Vitellogenin, a yolk precursor, has been suggested to play a role in this transport. We here report for the first time the temporal changes in OHC and an index of vitellogenin concentrations in female plasma from the pre-laying period to clutch completion in free-living birds: the southern rockhopper penguin (Eudyptes chrysocome chrysocome) breeding in the Falkland/Malvinas Islands. In addition, OHC concentrations in the corresponding clutches were analysed. OHC concentrations in female plasma and in the yolk of both the first (A-) and the second (B-)eggs followed a similar pattern, with hexachlorobenzene (HCB) > Σpolychlorinated biphenyls (PCBs) > Σdichlorodiphenyltrichloroethanes (DDTs) > Σmethoxylated polybrominated diphenyl ethers (MeO-PBDEs) > Σchlordanes (CHLs) > Σpolybrominated diphenyl ethers (PBDEs) ≈ Σhexachlorocyclohexanes (HCHs). The higher concentrations of MeO-PBDEs compared to PBDEs indicate a diet containing naturally-produced MeO-PBDEs. All OHC compounds except for PBDEs increased from the pre-laying period to A-egg laying and subsequently declined from A-egg laying to B-egg laying, and female plasma vitellogenin showed the same pattern. For ΣPCBs and ΣMeO-PBDEs, we found positive correlations between female plasma during A-egg laying and both eggs, and for HCB between female plasma and A-eggs only. During pre-laying, only ΣMeO-PBDEs correlated between both eggs and female plasma, and no correlations between OHC concentrations in eggs and female plasma were found during B-egg laying, highlighting that maternal transfer of OHCs is time- and compound-specific. Finally, female vitellogenin concentrations did not significantly correlate with any OHC compounds in either female plasma or eggs, and our results therefore did not confirm the suggested role of vitellogenin in the maternal transfer of OHC molecules into their eggs.
[Mh] Termos MeSH primário: Monitoramento Ambiental
Poluentes Ambientais/metabolismo
Hidrocarbonetos Halogenados/metabolismo
Óvulo/metabolismo
Spheniscidae/sangue
Vitelogeninas/metabolismo
[Mh] Termos MeSH secundário: Animais
DDT/metabolismo
Poluentes Ambientais/sangue
Feminino
Éteres Difenil Halogenados/análise
Éteres Difenil Halogenados/metabolismo
Hexaclorobenzeno/análise
Hexaclorobenzeno/metabolismo
Hidrocarbonetos Halogenados/sangue
Éteres Fenílicos
Bifenilos Policlorados/análise
Bifenilos Policlorados/metabolismo
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Environmental Pollutants); 0 (Halogenated Diphenyl Ethers); 0 (Hydrocarbons, Halogenated); 0 (Phenyl Ethers); 0 (Vitellogenins); 3O695R5M1U (phenyl ether); 4Z87H0LKUY (Hexachlorobenzene); CIW5S16655 (DDT); DFC2HB4I0K (Polychlorinated Biphenyls)
[Em] Mês de entrada:1707
[Cu] Atualização por classe:170720
[Lr] Data última revisão:
170720
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170411
[St] Status:MEDLINE


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[PMID]:28342994
[Au] Autor:Pozo K; Martellini T; Corsolini S; Harner T; Estellano V; Kukucka P; Mulder MD; Lammel G; Cincinelli A
[Ad] Endereço:Department of Physical, Earth and Environmental Sciences, University of Siena, Siena, Italy; Masaryk University, Research Centre for Toxic Compounds in the Environment, Brno, Czech Republic; Facultad de Ciencias, Universidad Católica Santísima Concepción, Concepción, Chile.
[Ti] Título:Persistent organic pollutants (POPs) in the atmosphere of coastal areas of the Ross Sea, Antarctica: Indications for long-term downward trends.
[So] Source:Chemosphere;178:458-465, 2017 Jul.
[Is] ISSN:1879-1298
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Passive air samplers were used to evaluate long-term trends and spatial distribution of trace organic compounds in Antarctica. Duplicate PUF disk samplers were deployed at six automatic weather stations in the coastal area of the Ross sea (East Antarctica), between December 2010 and January 2011, during the XXVI Italian Scientific Research Expedition. Among the investigated persistent organic compounds, Hexachlorobenzene was the most abundant, with air concentrations ranging from 0.8 to 50 pg m . In general, the following decreasing concentration order was found for the air samples analyzed: HCB > PeCB > PCBs > DDTs > HCHs. While HCB concentrations were in the same range as those reported in the atmosphere of other Antarctic sampling areas and did not show a decline, HCHs and DDTs levels were lower or similar to those determined one or two decades ago. In general, the very low concentrations reflected the pristine state of the East Antarctica air. Backward trajectories indicated the prevalence of air masses coming from the Antarctic continent. Local contamination and volatilization from ice were suggested as potential sources for the presence of persistent organic pollutants in the atmosphere.
[Mh] Termos MeSH primário: Poluentes Atmosféricos/análise
Monitoramento Ambiental/métodos
Compostos Orgânicos/análise
[Mh] Termos MeSH secundário: Regiões Antárticas
Atmosfera/análise
Monitoramento Ambiental/instrumentação
Hexaclorobenzeno/análise
Itália
Bifenilos Policlorados/análise
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Air Pollutants); 0 (Organic Chemicals); 4Z87H0LKUY (Hexachlorobenzene); DFC2HB4I0K (Polychlorinated Biphenyls)
[Em] Mês de entrada:1705
[Cu] Atualização por classe:170523
[Lr] Data última revisão:
170523
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170327
[St] Status:MEDLINE


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[PMID]:28336095
[Au] Autor:Bidleman TF; Laudon H; Nygren O; Svanberg S; Tysklind M
[Ad] Endereço:Dept. of Chemistry, Umeå University, SE-901 87 Umeå, Sweden. Electronic address: terry.bidleman@umu.se.
[Ti] Título:Chlorinated pesticides and natural brominated anisoles in air at three northern Baltic stations.
[So] Source:Environ Pollut;225:381-389, 2017 Jun.
[Is] ISSN:1873-6424
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Polyurethane foam (PUF) disk passive samplers were deployed at one inland and two island locations in the Bothnian Bay region of the northern Baltic Sea. Uptake was linear over 81-147 d and a temperature range of -2.6 to 14.2 °C for organochlorine pesticides (OCPs) and current-use pesticides (CUPs) having log K ≥9 at ambient temperatures. Partial saturation of the PUF disks occurred for the more volatile OCPs hexachlorocyclohexanes (HCHs) and hexachlorobenzene (HCB), and for bromoanisoles (BAs), which are products of bromophenols released by natural and anthropogenic sources. Correction for nonlinear uptake of these was made using experimentally measured PUF-air partition coefficients. Passive-derived air concentrations of pesticides were uniform over the bay and agreed within a factor of 2 or better with levels determined by active (pumped) sampling at one of the island stations. Levels of OCPs were similar to those reported at background sites in the European and Canadian Arctic and at monitoring stations in the central Baltic and southern Scandinavia, indicating long-range transport. The insecticide chlorpyrifos was 10 times lower at bay stations than in the Canadian Arctic. Insight to sources and processes was gained by examining compound profiles. Fractions F = α-HCH/(α-HCH + Î³-HCH) and F = trans-chlordane/(trans-chlordane + cis-chlordane) at bay stations were higher than in the Norwegian and Finnish Arctic and similar to those at the southern monitoring stations. Volatilization of chlordanes from Baltic seawater may also modify F . Higher F = 2,4,6-TriBA/(2,4,6-TriBA + 2,4-DiBA) distinguished local volatilization from the Baltic Sea versus lower F found at the inland site and reported in air on the Norwegian coast, suggesting westerly transport from the Atlantic across Norway and Sweden.
[Mh] Termos MeSH primário: Poluentes Atmosféricos/análise
Anisóis/análise
Monitoramento Ambiental
Hidrocarbonetos Clorados/análise
Praguicidas/análise
[Mh] Termos MeSH secundário: Regiões Árticas
Clordano/análise
Hexaclorobenzeno/análise
Inseticidas
Lindano/análise
Mar do Norte
Noruega
Países Escandinavos e Nórdicos
Água do Mar
Suécia
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Air Pollutants); 0 (Anisoles); 0 (Hydrocarbons, Chlorinated); 0 (Insecticides); 0 (Pesticides); 12789-03-6 (Chlordan); 319-84-6 (alpha-hexachlorocyclohexane); 4Z87H0LKUY (Hexachlorobenzene); 59NEE7PCAB (Lindane)
[Em] Mês de entrada:1708
[Cu] Atualização por classe:170804
[Lr] Data última revisão:
170804
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170325
[St] Status:MEDLINE


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[PMID]:28329713
[Au] Autor:Mamontova EA; Tarasova EN; Mamontov AA
[Ad] Endereço:Vinogradov Institute of Geochemistry, Siberian Branch of the Russian Academy of Sciences, 664033, Favorsky Str., 1A, PO Box 421, Irkutsk, Russia. Electronic address: elenam@igc.irk.ru.
[Ti] Título:PCBs and OCPs in human milk in Eastern Siberia, Russia: Levels, temporal trends and infant exposure assessment.
[So] Source:Chemosphere;178:239-248, 2017 Jul.
[Is] ISSN:1879-1298
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:The aim of our study is to investigate the spatial distribution of polychlorinated biphenyls (PCBs), hexachlorobenzene (HCB), dichlorodiphenyltrichloroethane (p,p'-DDT) and its metabolites, α- and γ-isomers of hexachlorocyclohexane (HCH) in 155 samples of human milk (HM) from Eastern Siberia (six towns and seven villages in Irkutsk Region, one village of the Republic of Buryatia and one town in Zabaikal'sk Region, Russia), and to examine the dietary and social factors influencing the human exposure to the organochlorines. The median and range of the concentration of six indicator PCBs in HM in 14 localities in Eastern Siberia (114 (19-655) ng g lipids respectively) are similar to levels in the majority of European countries. However, in one village, Onguren, the median and range of levels of six indicator PCBs (1390 (300-3725) ng g lipids) were comparable to levels measured in highly contaminated populations. The Lake Baikal seals are highly exposed to persistent organic pollutants (POPs) and could be a potential source of PCB and DDT exposure in the Onguren cohort via the consumption of the Lake Baikal seal tissue. The location of food production in areas exposed to the emissions of local POP sources can also significantly influence POP levels in HM samples from industrialized areas. Estimated daily intakes (EDI) of HCH and HCB for infants are considerably lower or close to acceptable daily intake (ADI). The EDI of total DDTs and total PCBs are higher than ADI.
[Mh] Termos MeSH primário: Hidrocarbonetos Clorados/análise
Leite Humano/química
Bifenilos Policlorados/análise
[Mh] Termos MeSH secundário: Animais
DDT/análise
DDT/metabolismo
Exposição Ambiental/análise
Europa (Continente)
Feminino
Hexaclorobenzeno/análise
Seres Humanos
Hidrocarbonetos Clorados/metabolismo
Lactente
Lindano/metabolismo
Bifenilos Policlorados/metabolismo
Federação Russa
Focas Verdadeiras
Sibéria
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Hydrocarbons, Chlorinated); 4Z87H0LKUY (Hexachlorobenzene); 59NEE7PCAB (Lindane); CIW5S16655 (DDT); DFC2HB4I0K (Polychlorinated Biphenyls)
[Em] Mês de entrada:1705
[Cu] Atualização por classe:170531
[Lr] Data última revisão:
170531
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170323
[St] Status:MEDLINE


  10 / 1538 MEDLINE  
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[PMID]:28316049
[Au] Autor:Zhang C; Wang B; Dai X; Li S; Lu G; Zhou Y
[Ad] Endereço:Research Center for Pollution Control and Ecological Restoration, Yuxi Normal University, Yuxi, 653100, People's Republic of China.
[Ti] Título:Structure and function of the bacterial communities during rhizoremediation of hexachlorobenzene in constructed wetlands.
[So] Source:Environ Sci Pollut Res Int;24(12):11483-11492, 2017 Apr.
[Is] ISSN:1614-7499
[Cp] País de publicação:Germany
[La] Idioma:eng
[Ab] Resumo:Vertical flow constructed wetlands (VF CWs) are considered to be effective for treating organic pollutants. The rhizosphere of macrophytes such as Phragmites sp., Typha sp. serves as an active and dynamic zone for the microbial degradation of organic pollutants. However, it is still not clear how soil bacterial communities respond to macrophytes and pollutants during the process. For this purpose, the seedlings of Phragmites australis and Typha angustifolia were planted respectively in the VF CWs added with HCB at a dose of 2 mg/kg. During 96 days of cultivation, we monitored hexachlorobenzene (HCB) removal efficiency by GC/MS and the structure of the rhizosphere bacterial communities in the different VF CWs by denaturing gradient gel electrophoresis (DGGE), and constructed bacterial clone library based on PCR-amplified 16S rRNA gene. As expected, the rhizosphere bacterial communities also remained insensitive to HCB exposure in the wetland soil. The diversity of these microbes presented two stages, from the varied up and down to equilibrium in the entire experimental period. Molecular analysis revealed that the phylum Firmicutes dominated over the bacterial communities. The genera that increased under HCB stress included the well-known HCB-degrading bacteria (Pseudomonas sp. and Alcaligenes sp.) and other common bacteria found in contaminated soil but with lesser known practical functions (Burkholderia sp., Lysinibacillus fusiformis, and Bacillus cereus). Furthermore, there was a certain variance in the relative abundances of the bacterial phyla and HCB removal efficiency among different VF CW treatments. The degradation of HCB in T. angustifolia microcosms was faster than that in P. australis and unvegetated wetlands, and the highest bacterial diversity and richness was found in the VF CWs comprising T. angustifolia.
[Mh] Termos MeSH primário: Bactérias/classificação
Hexaclorobenzeno/isolamento & purificação
Microbiologia da Água
Zonas Úmidas
[Mh] Termos MeSH secundário: Biodegradação Ambiental
Poaceae/metabolismo
RNA Ribossômico 16S/genética
Rizosfera
Typhaceae/metabolismo
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (RNA, Ribosomal, 16S); 4Z87H0LKUY (Hexachlorobenzene)
[Em] Mês de entrada:1706
[Cu] Atualização por classe:171103
[Lr] Data última revisão:
171103
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170320
[St] Status:MEDLINE
[do] DOI:10.1007/s11356-017-8463-1



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